In the European study, the number of phototoxic reactions was significantly lower in the afamelanotide group. (sciencedaily.com)
To make things simple I've just gone with the woodsy category — tea tree (also known as melaleuca), frankincense, sandalwood, and cedarwood — and one citrus oil that isn't phototoxic (sweet orange.) (wellnessmama.com)
A fully developed epidermis model is used to study phototoxic effects. (sciencedaily.com)